DE202004007158U1 - Control device for controlling a window regulator of a motor vehicle - Google Patents

Abstract

Control device for a motor vehicle window lifter has a sensor for determining the position of the window pane due to the movement of a window drive and a computer unit that serves both to determine the actual position of the window pane and the state or position of the vehicle roof. Independent claims are also included for the following; (1) digital storage medium for a computer program product. (2) vehicle window lifter with a control device.

Description

The The invention relates to a control device for controlling a Window lift of a motor vehicle.

From the DE 197 45 597 A1 is a method for controlling and regulating the adjustment of a translationally adjustable component, in particular a window in motor vehicles known. In this method for controlling and regulating the adjustment movement of the translationally adjustable component, with an adjusting device, a drive device and a control and electronic control is effective anti-trap protection taking into account a sufficiently large adjustment in Schwergängigkeitsbereichen and acting on the vehicle body, caused by external influences Ensures forces. For this purpose, the drive device exerts an adjusting force which is equal to the sum of the force required for adjusting the component and an excess force, the sum being less than or equal to a permissible clamping force. The adjusting force or the excess force is additionally regulated as a function of forces acting on the vehicle body or the filing thereof.

The solution guaranteed one over the whole adjustment range acting anti-trap protection, the corresponding Safety requirements met. Furthermore ensures that the adjustment even in the stiffness ranges is big enough and that an adjusting device is a translationally adjustable Component under consideration the external influences acting on the vehicle body in accordance with the operator material-friendly adjusted. As external influences are here the forces acting on the vehicle body or acceleration forces understood not directly by the actuator or caused by a drive means, but for example because of the poor condition of the route (passing a pothole) or when closing a vehicle door occur.

The Control of the adjusting force or the excess force is preferably carried out dependent on from the direction of movement of the translationally adjustable component and by the vast majority Direction of action occurring acceleration forces such that the adjustment is always less than or equal to the permissible pinching force. acts For example, on the vehicle body an acceleration force, the the closing movement supports a translationally adjustable component, so Preferably, the threshold is lowered. In case of occurrence one of the closing movement opposing acceleration force becomes the threshold increased. In this way, the adjusting force is always sufficient large, so that the closing movement is safe continued and an anti-trap protection is ensured.

Farther is provided that when occurring within a given Time varying on the vehicle body acting acceleration forces a Control of the adjusting force or the excess force interrupted is and a threshold value is specified such that the adjusting is always less than or equal to the permissible pinching force. The Time span is for example, 100 ms. This embodiment takes into account that at constantly changing, acting on the vehicle body acceleration forces of the Threshold is not constantly changed within a short period of time, what an impairment could lead to the movement of the translationally adjustable component. By the specification of a fixed threshold, always smaller or equal to the permissible pinching force is, is both a safe movement of translationally adjustable Ensured component as well as a pinch protection.

The be acting on the vehicle body acceleration forces preferably detected by a sensor, for example by a digital Signaling sensor. Digital signals can be combined in one Control and control electronics easy to process. To adjustment of the scheme one or more signals lying behind each other in time of the sensor are evaluated by the control and regulating electronics. The repeated evaluation of the signals of the sensor makes it possible a simultaneous occurrence of the acceleration forces caused by external influences and to identify the forces caused by a trapping case safely.

From the DE 195 17 958 a motor drive device for a motor vehicle is known. In the motor driving apparatus for a power window, the rotation of the motor is stopped immediately when the movement of the window with an engine turned obstructs an obstacle. The motor drive device serves to open and close the movable part (window) and can be selectively operated and stopped.

An electric current measuring device measures the magnitude of the current flowing through the motor in a start-up compensation time, a current magnitude change detecting device detects an amperage increment from the detected current at every constant time, and a motor controller supplies a first or a second control signal to the motor drive device first signal depending on the polarity of the Stromstärkeninkrements the engine operation continues and with the second signal, the engine is stopped immediately.

Two selector indicate the direction of rotation of the motor, a pair of key switches for the respective ones Motor directions and two self-holding circuits for the two Allow rotation of the motor a rotation of the motor when actuated one of the key switches.

task The present invention is a control device of a Adjustment of a motor vehicle to improve as possible. This task is achieved by the control device having the features of the claim 1, the window regulator with the features of claim 21, by the computer program product with the features of claim 20, and by the digital storage medium with the Characteristics of claim 19 solved. advantageous Further developments of the invention are specified in the subclaims. For further development of the invention, the features of the dependent claims are also particularly advantageous with each other and with features of the specified Combined state of the art.

Accordingly, a Control device with a sensor for determining one of a drive movement of a drive of the window lift dependent position a window pane of the window regulator provided. The from the sensor, For example, a displacement sensor or angular momentum sensor generated Position signals relate to the position of the window. For example, these counts are for one counted Position value and preferably proportional to the position. For example Position signals from a ripple of a drive current won a mechanically commutated electric motor. The sensor signals can be evaluated by the control device.

For this the control device has an analog, but preferably digital arithmetic unit, which has a function for combined evaluation of current position of the window pane and a state of a Hood of the motor vehicle has. The evaluation can be done for example, by a corresponding logic circuit as a computing unit, by a hard-wired program logic (ROM) as the arithmetic unit or by a programmable arithmetic unit.

The Invention includes the control of the window by the Position of a window pane of the window regulator is determined and a drive of the window depending on the determined Position is controlled. This will be the current control Position and a state of a hood of the motor vehicle combined evaluated.

In a development of the invention is used for the function of the combined Evaluation the current position depending on the state of the Top rated. As a result, the arithmetic unit has a function to the state of the top depending rating of the current Position up. For evaluation the information about the current position, for example, depending on the state of Ceiling differently weighted or assigned. The result the rating allows the control of different operating modes, such as standardization or non-normalization at a particular following blocking the adjustment and / or the activation or deactivation of an anti-jamming algorithm and / or the change parameters of the anti-jamming algorithm.

A first variant of the invention provides that the state of the hood a current top position of a particular motorically movable Cover is. For example, possible top positions "top Completely closed "," hood Completely opened "," hood partially closed "or" soft top closed and not locked ".

In an advantageous embodiment of this variant of the invention has the control device has an interface, in particular in the execution a bus, such as a CAN bus or LIN bus of Motor vehicle. A state characterizing the condition of the hood Signal is over this interface to the for the controller trained trained control device. The arithmetic unit is to evaluate this transmitted Signal set up.

One second variant of the invention provides that the condition of the hood through a plausibility check of the current position of the window is determined. requirement therefor is that the possibility to move certain adjustment positions of the window pane of the Condition of the hood depend. For example, if the adjustment of the window pane for an open Soft top allows the upper mechanical stop of the window lifter, while in the case of the closed hood of the adjustment by a Blocking the adjustment movement of the window pane is limited to the top, For example, the information can be obtained by means of the plausibility check, that the hood is at least partially open when the window pane over the expected blockage is adjusted out of the hood.

A development of this second variant of the invention is that the state of the hood is determined by evaluating a blocking characteristic at the closed position of the window. If, for example, a characteristic for the retraction of the window pane edge in the seal of the hood speed profile is determined, the corresponding current top position is assigned to this event and, for example, performed a normalization. The blocking characteristic is also or alternatively different cover types (hardtop, soft top) assigned to adjust the control of the window accordingly.

by virtue of of errors in determining the position of the window pane Displacements between the determined by the control device Position and the actual Position of the windowpane caused. In case of a blockage the adjustment between a trapped body part and a block on the stop of the hood to differentiate can, is a sufficiently accurate determination of the actual position of the window pane edge necessary in relation to the stop of the hood. Error during position determination increase the risk of misjudgment the actual Position by the control device, which increases the risk of pinching of a body part or a Fehlreversierens the window pane on the stop of the hood elevated. To reduce this risk becomes the position of the windowpane preferably repeatedly standardized in relation to the stop of the hood.

A advantageous development of this variant of the invention sees a normalization and / or denormalization of the determined position in relation on a disc-closing position dependent on from the condition of the hood. The disc-closing position is in particular the stopper of the hood or the mechanical stop of the window lifter, if the driver attached to the disc to an upper stop the window regulator rail is moved. These two attacks are common in the direction of the adjustment path locally added. A standardization is carried out preferably at the stop the hood, when this is in the closed state.

Preferably denormalization does not take place when a blockage is detected and the condition of the hood is determined to be open. In this case remains the previous standardization point of the previously determined position the stop of the closed canopy is obtained and is advantageously used as input value when the canopy is closed again and the window pane into the blocking position on the stop the top is moved.

In Another variant of the invention is the condition of the hood a type of hood, in particular a hardtop or Soft roof (soft top). For the purposes of the invention, the type of hood can as an alternative or combined with the top position, the state of the hood. The control device uses the Information which roof construction is installed to the respective Control windows or multiple windows.

advantageously, is used to control a closing movement the window lift stopped when pinching an object or a body part through the closing movement is detected within a detection position range. In addition, can after stopping the adjustment of the window pane vice versa become around the trapped object or the trapped body part release again.

in this connection are advantageously used to detect the drive movement dependent Characteristics by means of evaluated a detection algorithm. One or more parameters of the detection algorithm are in an advantageous development of Invention in dependence the condition of the hood, in particular depending on the type of hood customized. Such parameters are preferably of the expected binding when retracting the window pane edge in the seal of the hood dependent.

A Development of the invention provides that the or the parameters are the responsiveness of the detection algorithm in particular influence so that the responsiveness in dependence changed by the type of soft top becomes. The responsiveness is, for example, a constant Threshold or preferably a variable, position dependent threshold, the possible bindings considered in at least one end region of the adjustment path. For example, one is from the position of the seal of the hood dependent Course of the threshold provided, so that the responsiveness with increasing retraction of the disc edge in the seal of the Hood is reduced.

Preferably become the or the state, in particular the type the hood associated parameters depending on the state of the hood read out of a memory. Different states of the Cover is different parameter values in the memory assigned. Preferably, several of the parameters form here Map for the responsiveness.

A Further advantageous embodiment of the invention provides that at least one of the parameters a position shift (offset) for the Responsiveness forms. For example, an identical Course of sensitivity over the position distances in the adjustment of the window pane for different states of the hood preset, is the sensitivity using the position shift to the for adjusted the state significant position of the stop of the hood. Preferably, the parameters are different, in cooperation with the disc edge occurring sealing properties of different Types of cover adapted.

Preferably is the arithmetic unit for learning the parameter (s) in dependence formed by one or more previous adjustments. The learning allows an adaptation to different temperatures or changes of the mechanical system the useful life of the motor vehicle. Advantageously, the Arithmetic unit designed to learn the parameter or location-dependent speeds or location-dependent bindings to evaluate, in particular to average. This is a dynamic Adaptation of the parameters, in particular a reversing criterion determine possible. The Reversing criterion is preferably a threshold, the component the said detection algorithm is. Through the dynamic adaptation the parameter becomes responsiveness by means of this reversing criterion customized.

The The invention also includes a digital storage medium, in particular a floppy disk or a memory chip, with electronically readable control signals, which can interact with a programmable arithmetic unit so that the position of a window pane of the window regulator is determined and a drive of the window lift in dependence on the determined Position is controlled, with the current position to control and evaluates a condition of a hood of the motor vehicle combined become.

Farther The invention includes a computer program product with on one machine-readable carrier, in particular a semiconductor memory, stored program code for controlling a window regulator of a motor vehicle by the position a window pane of the window lift is determined and a drive of the window depending on is controlled by the determined position, wherein the control the current position and a state of a hood of the motor vehicle combined be evaluated when the program runs on a computing unit.

moreover The invention comprises a computer program with a program code for controlling a window regulator of a motor vehicle by the Position of a window pane of the window regulator is determined and a drive of the window depending on the determined Position is controlled, with the current position to control and evaluates a condition of a hood of the motor vehicle combined when the program runs on a processor.

object The invention is also a window lift of a motor vehicle with a control device, the at least one sensor for determining one of a drive movement of a drive of the window regulator dependent Position of a window of the window regulator, and a computing unit, the one function for the combined evaluation of the current position the window pane and a state of a hood of the motor vehicle comprises.

in the The following will illustrate the invention by way of example embodiments explained in more detail by drawings. The stated advantages refer to the respective embodiment.

there demonstrate

1 a control device with an electronic control unit for controlling an electric motor of a window lifter, and

2 a schematic functional sequence for different hood types.

In 1 a control device of a window lift of a motor vehicle is shown. The control device comprises control electronics with a anti-trap function. In addition, the control electronics are connected via a bus with other functional units of the motor vehicle, wherein via the bus information about the mounted concealment type to the control electronics of the control device is transferable. The control electronics has a common electronic memory, in which at least the data required for the anti-trap protection are stored, written and readable under algorithms.

Furthermore, the control device has a sensor detection of a dependent of a drive movement of a drive of the window lifter position of a window of the window regulator. The position is at the bottom and top of the 1 representing the course of the speed n of the window regulator motor over the determined position x represents. One also not in the 1 illustrated arithmetic unit of the control electronics has a function for the combined evaluation of the current Position x of the window pane and a state of a hood of the motor vehicle.

The arithmetic unit of the control electronics has a detection algorithm for detecting at least one parameter dependent on the drive movement. This characteristic is in the in the 1 illustrated embodiment, the speed n of the window regulator motor M. If the speed n of the window regulator motor M falls below in the 1 shown Reversierkriterium that is exemplified by a threshold value of the detection algorithm, the pinching of an object or a body part is detected and the control electronics then stops the closing movement of the window regulator. Subsequently, the drive of the window regulator motor is operated in the direction of opening, so that reverses the adjustment of the window pane. Instead of the rotational speed n, another signal dependent on the drive movement, such as, preferably, the drive current or the temporal change in the rotational speed dn / dt can be compared for evaluation with a reversing criterion.

The reversing criterion acting as a threshold value, which in the upper and lower part of the 1 is determined by a plurality of parameters that can be stored in the common electronic memory, determined. The memory is, for example, a non-volatile memory (EEPROM), which also receives a storage of the parameters for the detection of a trapping case, even in the event of a failing power supply. With the information transmitted by the bus to the control electronics information about the mounted concealment type is read out by the control electronics in dependence on the mounted concealed type from the common electronics memory the Paramteter the Reversierkriteriums to built obesity and read to control the drive in a register of the microcontroller of the control electronics.

The parameters for a soft roof (soft top) determine the upper part of the 1 illustrated course of the Reversierkriteriums, whereas the hard roof (hardtop) associated parameters in the lower part of the 1 determine the course of the reversing criterion. In the case shown, the inlet of the window pane in the seal of a soft top of the inlet into the seal of a hard top, as shown in the lower part of 1 is shown, different. While in the case of the soft top, the speed of the window regulator motor drops much slower, the mechanical system behaves with a mounted hardtop less elastic, as in the lower part of the 1 is shown.

from that This results in the different movement patterns in the Retracting the window pane edge into the seal of the soft top or the hardtop the reversing criterion for these different hood types must be adjusted accordingly to prevent a Fehlreversieren and to reduce the risk of trapping. Depending on the type of concealment is just installed, so is an optimal adjustment of the Reversierkriteriums to the expected change the speed of the window regulator motor in the area of the seal possible.

In 2 schematically a functional sequence for different top types is shown. After the start of the adjustment of the window lifter is first checked in step 1, whether a soft or hardtop is installed. This information about the hidden type installed will be as in 1 shown, previously transmitted via a bus system to the control device. In the case where a soft top is installed and the in 1 is expected in the upper range, it is checked in a second step, whether a change of concealed type has taken place from a hard top to a soft top. This check of the second step can be determined for example by means of a stored in the common electronic memory identifier (flag).

Has a change from a hardtop to a softtop took place in which these different top types were dismantled or mounted, is adjusted in step 3 the reversing criterion for a soft top, by putting the corresponding parameters of the soft top out of the common Electronic memory in the current register of the microcontroller the control electronics are loaded. Thereby these parameters become initialized as anti-trap adaptation data. Einklemmschutzadaptionsdaten in this case means that the parameters used for the soft top determined by renewed measurements of the window regulator speed for the seal inlet and the parameters are re-learned accordingly to change the conditions of the elasticity compensate for the seal and the position of the seal and adapt.

In step 4 of the 2 , which follows directly to step 2 or step 3, is checked on the basis of a bus information, whether the hood is closed. In the affirmative case, the parameters for the soft top in step 5 of the 1 dynamically adjusted, averaged in the further adjustment movement in the seal inlet and evaluated by the corresponding conditional due to the seal bindings. Following one of the steps 4 or 5, further processes for calculating the anti-jamming protection may follow in step 6.

If a hardtop is installed starting from step 1, then it is again checked in step 7 whether a change from soft to hardtop has taken place. In the affirmative case, the initialization of the adaptation data read in the common electronic memory for this hardtop takes place again in the 8th step. Subsequent to the steps 7 or 8 again takes place in step 5, the dynamic adjustment of the anti-pinch thresholds form the Reversierkriterium, regardless of the query in step 4, since a hardtop is always closed.

n

rotation speed

bus

CAN bus, LIN bus, bus system

FH

power windows

EKS

pinch

Claims (21)

Control device of a window regulator of a Motor vehicle with - one Sensor for determining one of a drive movement of a drive dependent of the window regulator Position of a window pane of the window regulator, and - one Arithmetic unit that has a function for the combined evaluation of current position of the window pane and a state of a Hood of the motor vehicle has. Control device according to Claim 1, characterized that the arithmetic unit has a function of the condition of the hood dependent Assessment of the current position. Control device according to one of the preceding Claims, characterized in that the state of the hood is a current Hood position of a particular motor-driven hood is. Control device according to one of the preceding Claims, characterized by an interface, in particular a bus of Motor vehicle, about a signal characterizing the condition of the hood is transferable and wherein the arithmetic unit is set up to evaluate this signal is. Control device according to one of the preceding Claims, characterized in that the arithmetic unit for the plausibility check of the current Position of the window pane established in relation to the state of the hood is. Control device according to one of the preceding Claims, characterized in that the arithmetic unit has the function the state of the hood by evaluating a blocking characteristic at the closed position to determine the window pane. Control device according to one of the preceding Claims, characterized in that the arithmetic unit performs the function for Normalization and / or denormalization of the determined position in relation on a disc-closing position dependent on from the state of the hood. Control device according to one of the preceding Claims, characterized in that the arithmetic unit is set up for non-denormalization depending on from the open state of the hood. Control device according to one of the preceding Claims, characterized in that the state of the hood, the top position and / or a type of hood is. Control device according to one of the preceding Claims, characterized in that the arithmetic unit for protection against a pinching of an object or a body part is set up, by a stop control of a closing movement of the window lifter, if the pinching by the closing movement within a detection position range is detectable. Control device according to claim 10, characterized characterized in that the arithmetic unit is a detection algorithm for detecting at least one parameter dependent on the drive movement, and one or more parameters of the detection algorithm as a function of Condition of the hood, in particular depending on the type of hood are customizable. Control device according to claim 11, characterized characterized in that the parameter or parameters the responsiveness of the detection algorithm. Control device according to one of claims 11 or 12, characterized in that the or the in particular the type of hood associated parameters depending stored by the state of the hood in a memory of the arithmetic unit are. Control device according to one of claims 11 to 13, characterized in that a plurality of the parameters a map for the Form responsiveness. Control device according to one of claims 11 to 14, characterized in that at least one of the parameters Position shift (offset) for the responsiveness forms. Control device according to one of claims 11 to 14, characterized in that the Parameter different, occurring in cooperation with the disc edge sealing properties of different types of covers are adjusted. Control device at least according to claim 11, characterized in that the arithmetic unit for learning the or the parameters depending formed by one or more previous adjustments is. Control device according to claim 17, characterized characterized in that the arithmetic unit is designed for learning of the parameter or location-dependent Speeds or location-dependent bindings to evaluate, in particular to average. Digital storage medium, in particular floppy disk, with electronically readable control signals, so with a programmable Arithmetic unit interact that the position of a windowpane the window regulator of a motor vehicle and determines a drive of the window depending on is controlled by the determined position, wherein the control the current position and a state of a hood of the motor vehicle be evaluated combined. Calculator program product with on a machine readable carrier stored program code containing the position of a window pane of the Window lift of a motor vehicle determined and a drive of Windows depending on controlled by the determined position, wherein the control for the current Position and a state of a hood of the motor vehicle combined be evaluated when the program product on a computing unit expires. Window lift of a motor vehicle with a control device, the least - one Sensor for determining one of a drive movement of a drive dependent of the window regulator Position of a window pane of the window regulator, and A computing unit, the one function for the combined evaluation of the current position the window pane and a state of a hood of the motor vehicle comprises.